Meanings
- set phraseAt some unspecified time in the future.
One day I shall upgrade my software, but not just yet.
1 more example
This was a voluntary charter flight, not an ICE enforcement operation. All participants were offered the same benefits as any illegal alien who self-deports using the CBP Home App. They received travel assistance, a $1,000 stipend, and preserved the possibility they could one day return to the United States legally.
2025 May 19, “Project Homecoming Charter Flight Brings Self-Deporters to Honduras, Colombia”, in Department of Homeland SecuritySynonyms: one of these days, some day
- At some unspecified time in the past.
One day I was playing with a girl from my class.
1 more example
One day I was out in the barn and he drifted in. I was currying the horse and he set down on the wheelbarrow and begun to ask questions.
1913, Joseph C[rosby] Lincoln, chapter XI, in Mr. Pratt’s Patients, New York, N.Y.; London: D[aniel] Appleton and Company, →OCLCSynonyms: once
- Used other than figuratively or idiomatically: see one, day.
You can stay one day or two.
Synonyms: byembye, hereafter, in the future, later, later on, one of these days, one of these fine days, someday
Synonyms & antonyms
adverbAt some unspecified time in the future.
adverbAt some unspecified time in the past.
adverbUsed other than figuratively or idiomatically: see one, day.
Translations
Arabic مَرَّةً, يَوْمًا
- مَرَّةً (marratan)at unspecified time in the future
- يَوْمًا (yawman)at unspecified time in the future
- فِي يَوْمٍ مِنَ ٱلْأَيَّامِ (fī yawmin mina l-ʔayyāmi)at unspecified time in the past
Bengali একদিন, একদিন
- একদিন (ekdin)at unspecified time in the future
- একদিন (ekdin)at unspecified time in the past
- একদা (ekoda)at unspecified time in the past
Catalan un dia
- un diaat unspecified time in the future
Chinese Mandarin 某一天, 有一天
- 某一天 (mǒu yī tiān)at unspecified time in the future
- 有一天 (yǒu yī tiān)at unspecified time in the future
- 一天 (yī tiān)at unspecified time in the future
- 一天 (yī tiān)at unspecified time in the past
Czech někdy
- někdyat unspecified time in the future
Esperanto iam
- iamat unspecified time in the future
Finnish jonakin päivänä, joskus
- jonakin päivänäat unspecified time in the future
- joskusat unspecified time in the future
- eräänä päivänäat unspecified time in the past
French un jour, un jour
- un jourat unspecified time in the future
- un jourat unspecified time in the past
German eines Tages, eines Tages
- eines Tagesat unspecified time in the future
- eines Tagesat unspecified time in the past
Greek κάποια μέρα, κάποτε
- κάποια μέρα (kápoia méra)at unspecified time in the future
- κάποτε (kápote)at unspecified time in the past
Hindi एक दिन
- एक दिन (ek din)at unspecified time in the future
Hungarian egy napon, egy szép napon
- egy naponat unspecified time in the future
- egy szép naponat unspecified time in the future
- egyszer majdat unspecified time in the future
- majd valamikorat unspecified time in the future
- egy naponat unspecified time in the past
- egy szép naponat unspecified time in the past
- egyszerat unspecified time in the past
Italian un giorno o l'altro, una volta
- un giorno o l'altroat unspecified time in the future
- una voltaat unspecified time in the past
Japanese いつか, ある日
- いつか (itsuka)at unspecified time in the future
- ある日 (aru hi)at unspecified time in the past
Korean 언젠가, 어느 날
- 언젠가 (eonjen'ga)at unspecified time in the future
- 어느 날 (eoneu nal)at unspecified time in the past
- 하루는 (haruneun)at unspecified time in the past
Latin olim, olim
- olimat unspecified time in the future
- olimat unspecified time in the past
Norwegian Bokmål en gang, en dag
- en gangat unspecified time in the future
- en dagat unspecified time in the future
Polish kiedyś, pewnego dnia
- kiedyśat unspecified time in the future
- pewnego dniaat unspecified time in the future
- któregoś dniaat unspecified time in the future
- kiedyśat unspecified time in the past
- pewnego dniaat unspecified time in the past
Portuguese algum dia, uma vez
- algum diaat unspecified time in the future
- uma vezat unspecified time in the past
- um diaat unspecified time in the past
Romanian într-o zi, într-o zi
- într-o ziat unspecified time in the future
- într-o ziat unspecified time in the past
Russian одна́жды, когда́-нибу́дь
- одна́жды (odnáždy)at unspecified time in the future
- когда́-нибу́дь (kogdá-nibúdʹ)at unspecified time in the future
- когда́-то (kogdá-to)at unspecified time in the future
- одна́жды (odnáždy)at unspecified time in the past
- когда́-то (kogdá-to)at unspecified time in the past
- ка́к-то (kák-to)at unspecified time in the past
Scottish Gaelic latha de na làithean, lath'-eigin
- latha de na làitheanat unspecified time in the future
- lath'-eiginat unspecified time in the future
- latha a bha seoat unspecified time in the past
- latha de na làitheanat unspecified time in the past
Slovak niekedy
- niekedyat unspecified time in the future
Spanish algún día
- algún díaat unspecified time in the future
Swedish en vacker dag
- en vacker dagat unspecified time in the future
Tagalog balang-araw, isang araw
- balang-arawat unspecified time in the future
- isang arawat unspecified time in the past
Tamil ஒரு நால், பின்னால்
- ஒரு நால் (oru nāl)at unspecified time in the future
- பின்னால் (piṉṉāl)at unspecified time in the past
Turkish bir gün, bir gün
- bir günat unspecified time in the future
- bir günat unspecified time in the past
Ukrainian коли́сь, коли́-не́будь
- коли́сь (kolýsʹ)at unspecified time in the future
- коли́-не́будь (kolý-nébudʹ)at unspecified time in the future
Welsh undydd
- undyddat unspecified time in the past
Cite this entry
one day. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/one%20day
“one day.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/one%20day. Accessed November 4, 2026.
WatkinsX Dictionary, s.v. “one day,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/one%20day.
Source: one day on Wiktionary, CC BY-SA 4.0.